You do have to use an FQDN to access it. The web management will not respond to IP address
requests. When you set up the engine, what FQDN did you use ? In the hosts file of the
machine you are using to access the engine, create an entry for that website:
Example:
10.10.254.10 your.fqdm.tld
or better example
10.10.254.10
ovirtmgmt.yourdomain.com